Replace Frog, FrogDemo with  FroggieView and  FrogReconstruction with FroggieSurface

See merge request !302

Rework the track and improve data selection

See merge request !301

1) Command line arguments simplified.
2) Indexing to allow tracing back to original data points.
3) We now drop rows with nan in them.
4) Enabling the vtkCameraOrientationWidget.

1) Adding "Track" for Track Name.
2) Adding "nan" for missing numeric data.

Updating the file handling and instructions

See merge request !300